SOLUTION: Kathy is twice as old as Lisa. Three years from now, the sum of their ages will be 42. How old is Kathy? I would like it if you showed my step, by step how did you do it, I got

Question 242932: Kathy is twice as old as Lisa. Three years from now, the sum of their ages will be 42. How old is Kathy?
I would like it if you showed my step, by step how did you do it, I got the answer 24 myself but I'm not completely sure how it did it
X = Kathy's age, 42/2 +3, and then i got 24...
but somehow, your suppose to write it like this: equation=42
Answer by JimboP1977(311) (Show Source): You can put this solution on YOUR website!
Good to see you have had a good go at this problem!
Let K = Kathy's age and L=Lisa's age

Subsitute K/2 in for L:

Does that help? Make any sense?
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